So, I’ve deactivated all three of my Macs and my Droid, and deleted my Dropbox account. Fortunately, I didn’t use that password anywhere else, so I’m done.

Your service was convenient, so I’ll check our your competitors to see if they have a better security posture and more transparency. If so, I’ll likely end up paying for their service. Thanks for showing me how useful a sharing service like yours could be, but too bad I couldn’t stay with you.